Assay device



FIG. 1 is an end elevational view of an assay device showing our new design;

FIG. 2 is an end elevational view of thereof, taken form the opposite side;

FIG. 3 is a side elevation view thereof, the opposite side elevational view being a mirror image thereto;

FIG. 4 is a top plan view thereof, shown in open condition;

FIG. 5 is a top plan view thereof, shown in closed condition; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for an assay device, as shown and described. 